Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, and non-destructive behavior. The description adds value by specifying the required OAuth scope ('opportunities.readonly') and the exact REST endpoint, which gives useful access context beyond the annotations. However, it does not describe return shape, error behavior, or pagination, so the added behavioral context is limited.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.